Homogeneous or supported vanadium based catalyst for olefin polymerization

Abstract

Disclosed is a homogeneous vanadium catalyst composition prepared by the reaction of an alkylaluminum dihalide with a solid reaction product produced by reacting (A) a silicon alkoxide, (B) a hydrocarbon soluble vanadium compound, and (C) a trialkylaluminum. The solid reaction product may be produced by complexing the (A) silicon alkoxide first with either the (B) vanadium compound or the (C) trialkylaluminum. The intermediate complex (I) of such reaction is then treated with the remaining reagent (either the vanadium compound or the trialkylaluminum as the case may be) whereupon the solid reaction product (II) is formed. The solid reaction product (II) of the silicon alkoxide-vanadium compound/trialkylaluminum reaction is then reacted with (D) an alkylaluminum dihalide to produce a homogeneous hydrocarbon soluble product (III) which is highly active for catalyzing the polymerization of olefins to a polyolefin having a narrow molecular weight distribution. Further, the hydrocarbon soluble product (III) may be used to treat a catalyst support material (E) to produce a heterogeneous supported vanadium-containing catalyst composition (IV) which is highly active for catalyzing the production of polyolefins having a narrow molecular weight distribution.

What is claimed is: 
     
       1. A method for preparing a hydrocarbon soluble vanadium based catalyst component for the production of polyolefins, comprising the steps of: (i) forming a hydrocarbon insoluble reaction product from a silicon alkoxide, a hydrocarbon soluble vanadium compound and a trialkylaluminum; and   (ii) reacting said hydrocarbon insoluble reaction product with an alkylaluminum dihalide to form a hydrocarbon soluble vanadium containing composition which is active for the polymerization of olefins to polyolefins.   
     
     
       2. The method of claim 1, wherein said silicon alkoxide is of the general formula Si(OR s ) 4-k  R s'   wherein R s , R s'   are C 1-18  hydrocarbon radicals and 0≦k≦3, and said hydrocarbon soluble vanadium compound is selected from the group consisting of the general formulas: ##STR2## wherein: m is 0-3; n is 0,3-4;   p is 2-3;   q is 0 or 2-3;   x and y are 1-2, x≠y;   R v  is a C 1-18  hydrocarbon radical;   R v'   is acetylacetonate;   X ia --Cl or --Br; and   L is a Lewis base capable of forming hydrocarbonsoluble complexes with VX 3 .   
     
     
       3. The method of claim 2, wherein said trialkyaluminum is of the general formula Al(R) 3 , wherein R is a C 1-18  hydrocarbon radical. 
     
     
       4. The method of claim 3, wherein said alkylaluminum dihalide is of the formula:   Al(R.sup.a)Y.sub.2,     wherein R a  is a C 1-18  hydrocarbon radical and Y is a halogen atom.   
     
     
       5. The method of claim 4, wherein said hydrocarbon insoluble reaction product is formed by first reacting said silicon alkoxide with said vanadium compound to form an intermediate product and thereafter reacting said intermediate product with said trialkylaluminum. 
     
     
       6. The method of claim 4, wherein said hydrocarbon insoluble reaction product is formed by first reacting said silicon alkoxide with said trialkylaluminum to form an intermediate product and thereafter reacting said intermediate product with said vanadium compound. 
     
     
       7. The method of claims 5 or 6, wherein said alkylaluminum dihalide is ethylaluminum dichloride. 
     
     
       8. The method of claim 7, wherein said silicon alkoxide is silicon tetra-alkoxide. 
     
     
       9. A process for preparing a hydrocarbon soluble vanadium-based catalyst for the production of olefin copolymers, comprising the steps of (i) contacting a silicon alkoxide of the formula Si(OR s ) 4-k  R k   s'   wherein R s , R s'   are C 1-18  hydrocarbon radicals, and 0 ≦k≦3 with a vanadium compound selected from the group consisting of the general formulas: ##STR3##   wherein: m is 0-3; n is 0,3-4;   p is 2-3;   q is 0 or 2-3;   x and y are 1-2, x≠y;   R v  is a C 1-18  hydrocarbon radical;   R v'   is acetylacetonate;   X ia --Cl or --Br; and   L is a Lewis base capable of forming hydrocarbon-soluble complexes with VX 3  to form an intermediate reaction product (I);     (ii) reacting said intermediate reaction product (I) with a trialkyl alminum of the general formula Al(R) 3 , wherein R is a C 1-18  hydrocarbon radical to form a solid reaction product (II); and   (iii) adding to said solid reaction product (II) an alkylaluminum dihalide of the formula:   Al(R.sup.a)Y.sub.2,         wherein R a  is a C 1-18  hydrocarbon radical and Y is a halogen atom, to produce a homogeneous catalyst solution (III).   
     
     
       10. The process of claim 9, wherein the vanadium-based catalyst is prepared in heterogeneous supported form, further including the steps of: (iv) adding to said homogeneous catalyst solution (III) a dry support material to produce a slurry;   (v) stirring said slurry for about 30 minutes; and   (vi) separating a supported catalyst product from said slurry.   
     
     
       11. A process for preparing a hydrocarbon soluble vanadium-based catalyst for the production of polyolefin comprising the steps of: (i) contacting a trialkyl aluminum of the general formula Al(R) 3 , wherein R is a C 1-18  hydrocarbon radical, with a silicon alkoxide of the formula Si(OR s ) 4-k  R k   s'   wherein R s , R s'   are C 1-18  hydrocarbon radicals, and 0≦k≦3, to form an intermediate reaction product (I);   (ii) reacting said intermediate reaction product (I) with a vanadium compound selected from the group consisting of the general formulas: ##STR4##   wherein: m is 0-3; n is 0,3-4;   p is 2-3;   q is 0 or 2-3;   x and y are 1-2, x≠y;   R v  is a C 1-18  hydrocarbon radical;   R v'   is acetylacetonate;   X ia --Cl or --Br; and   L is a Lewis base capable of forming hydrocarbon-soluble complexes with VX 3 , to form an intermediate reaction product (II); and     (iii) adding to said solid reaction product (II) an alkylaluminum dihalide of the formula:   Al(R.sup.a)Y.sub.2,         wherein R a  is a C 1-18  hydrocarbon radical and Y is a halogen atom, to produce a homogeneous catalyst solution (III).   
     
     
       12. The process of claim 11, wherein the vanadiumbased catalyst is prepared in heterogeneous supported form, further including the steps of: (iv) adding to said homogeneous catalyst solution (III) a dry support material to produce a slurry;   (v) stirring said slurry for about 30 minutes; and   (vi) separating a supported catalyst product from said slurry.   
     
     
       13. The process of claims 9, 10, 11 or 12, wherein said trialkylaluminum is triethylaluminum. 
     
     
       14. The process of claims 9, 10, 11 or 12, wherein said silicon alkoxide is silicon tetra-alkoxide. 
     
     
       15. The process of claims 9, 10, 11 or 12, wherein said alkylaluminum dihalide is ethylaluminum dichloride. 
     
     
       16. A vanadium-based catalyst for the production of polyolefins produced by the process comprising the steps of: (i) forming a hydrocarbon insoluble reaction product from a silicon alkoxide, a hydrocarbon soluble vanadium compound and a trialkylaluminum; and   (ii) reacting said hydrocarbon insoluble reaction product with an alkylaluminum dihalide to form a hydrocarbon soluble vanadium containing composition which is active for the polymerization of olefins to polyolefins.   
     
     
       17. The vanadium-based catalyst of claim 16, wherein said silicon alkoxide is of the general formula Si(OR s ) 4-k  R k   s'   wherein R 5 , R 5'   are C 1-18  hydrocarbon radicals and 0≦k≦3, said hydrocarbon soluble vanadium compound is selected from the group consisting of the general formulas: ##STR5## wherein: m is 0-3; n is 0,3-4;   p is 2-3;   q is 0 or 2-3;   x and y are 1-2, x≠y;   R v  is a C 1-18  hydrocarbon radical;   R v'   is acetylacetonate;   X ia --Cl or --Br; and   L is a Lewis base capable of forming hydrocarbonsoluble complexes with VX 3  ; said trialky-aluminum is of the general formula Al(R) 3 , wherein R is a C 1-18  hydrocarbon radical; and said alkylaluminum dihalide is of the formula: Al(R a )Y 2 ,       wherein R a  is a C 1-18  hydrocarbon radical and Y is a halogen atom.   
     
     
       18. The vanadium-based catalyst of claim 17, wherein said hydrocarbon insoluble reaction product is formed by first reacting said silicon alkoxide with said vanadium compound to form an intermediate product and thereafter reacting said intermediate product with said trialkylaluminum. 
     
     
       19. The vanadium-based catalyst of claim 17, wherein said hydrocarbon insoluble reaction product is formed by first reacting said silicon alkoxide with said trialkylaluminum to form an intermediate product and thereafter reacting said intermediate product with said vanadium compound. 
     
     
       20. The vanadium-based catalyst of claim 18 or 19, wherein said alkylaluminum dihalide is ethylaluminum dichloride. 
     
     
       21. The vanadium-based catalyst of claim 20 wherein said catalyst is prepared in heterogeneous supported form further including the steps of: (iv) adding to said homogeneous catalyst solution (III) a dry support material to produce a slurry;   (v) stirring said slurry for about 30 minutes; and   (vi) separating a supported catalyst product from said slurry.